# File lib/em/pure_ruby.rb, line 837
      def start_server chain
        sd = Socket.new( Socket::AF_LOCAL, Socket::SOCK_STREAM, 0 )
        sd.setsockopt( Socket::SOL_SOCKET, Socket::SO_REUSEADDR, true )
        sd.bind( Socket.pack_sockaddr_un( chain ))
        sd.listen( 50 ) # 5 is what you see in all the books. Ain't enough.
        EvmaUNIXServer.new sd
      end